When it comes to internal combustion engines (ICEs), it’s generally accepted that each cylinder doesn’t have more valves to let in a fresh fuel mixture and to exhaust the aftermath …read more (https://hackaday.com/2026/10/30/making-internal-combustion-engines-better-with-more-valves/)

A 1982 Modem for $100
https://hackaday.com/2026/10/30/a-1982-modem-for-100/

[Dave Farquhar] takes a walk down memory lane about the Commodore 1600 VICModem, perhaps the first phone modem to sell for less than $100. Commodore, of course, was famous for …read more (https://hackaday.com/2026/10/30/a-1982-modem-for-100/)

VR Headset Ditches the Base Stations with DIY Tracking
https://hackaday.com/2026/10/30/vr-headset-ditches-the-base-stations-with-diy-tracking/

Those in the virtual reality scene might be interested in [Prohurtz]’s add-on for the Bigscreen Beyond VR headset. BSB-SLAM adds SLAM (Simultaneous Localization and Mapping) tracking to the headset by attaching …read more (https://hackaday.com/2026/10/30/vr-headset-ditches-the-base-stations-with-diy-tracking/)

Novelty Camera To USB Camera
https://hackaday.com/2026/10/30/novelty-camera-to-usb-camera/

The Godox C100 is a cheap camera that’s best described as a toy, its party trick being a large clear viewfinder with a head-up-display light meter. It’s by no means …read more (https://hackaday.com/2026/10/30/novelty-camera-to-usb-camera/)

3D Printed Einstein-Szilard Refrigerator Cools with Fire
https://hackaday.com/2026/10/31/3d-printed-einstein-szilard-refrigerator-cools-with-fire/

They may not deliver the highest efficiency, but absorption refrigerators have earned a persistent place in camper vans and industrial plants thanks to a few distinct advantages: they can operate …read more (https://hackaday.com/2026/10/31/3d-printed-einstein-szilard-refrigerator-cools-with-fire/)

Learn to Edit STL Files in Just a Few Minutes
https://hackaday.com/2026/10/31/learn-to-edit-stl-files-in-just-a-few-minutes/

Sometimes an STL file needs a bit of editing, but if one doesn’t already know how to use a mesh editor it’s unlikely that one has the time to sit …read more (https://hackaday.com/2026/10/31/learn-to-edit-stl-files-in-just-a-few-minutes/)

Bring On Supercon!
https://hackaday.com/2026/10/31/bring-on-supercon/

Standing room only during a 2017 Hackaday Supercon talk
" data-large-file="https://hackaday.com/wp-content/uploads/2017/11/supercon-recap-article-featured.jpg?w=800">In just under a week from today, almost 700 hackers will be getting together in Pasadena, CA for three days of scheming, soldering, and socializing. If you’re able to join …read more (https://hackaday.com/2026/10/31/bring-on-supercon/)

DIY WiFi Analyzer Sniffs Out Congestion and Coverage Issues, Suggests Fixes
https://hackaday.com/2026/10/31/diy-wifi-analyzer-sniffs-out-congestion-and-coverage-issues-suggests-fixes/